Thread: Rusty Dusty, bad smelling powder

went to do some reloading, and had a powder go bad,

I had been storing said powder, in its plastic container, in a ammo tin, in a safe. (dunno if this was bad/the cause?)

the powder where freebies of an unknown age, (Vihtavuori N110)
I have disposed of this powder,

now my concern is, it was not stored alone, and had a couple other powders in the ammo tin with it,

when i opened there containers there was the same rusty dust come out of these,
but when the dust cleared the same smell was not present, so i am assuming the dust/gas made its way in from the off powder some how? or are they on there way out aswell?

are these powders stuffed aswell? or OK?

also how should i be storing the powder? was I doing it correctly/safely?